Table 7 Test design and results of response surface of second group.
No. | X1 | X2 | X3 | Y1 (%) |
|---|---|---|---|---|
1 | − 1 | − 1 | − 1 | 12.52 |
2 | 0 | − 1 | − 1 | 10.87 |
3 | 1 | − 1 | − 1 | 9.92 |
4 | − 1 | − 1 | 1 | 9.28 |
5 | 0 | − 1 | 1 | 8.06 |
6 | 1 | − 1 | 1 | 8.17 |
7 | 0 | − 1 | 0 | 8.94 |
8 | 1 | − 1 | 0 | 8.47 |
9 | − 1 | 0 | − 1 | 10.51 |
10 | 0 | 0 | − 1 | 9.41 |
11 | 1 | 0 | − 1 | 7.96 |
12 | − 1 | 0 | 1 | 8.22 |
13 | 0 | 0 | 1 | 6.67 |
14 | 1 | 0 | 1 | 7.45 |
15 | − 1 | 0 | 0 | 9.68 |
16 | 0 | 0 | 0 | 9.27 |
17 | − 1 | 1 | − 1 | 12.61 |
